The results indicated: 1) Young spikes developed into frost sensitive period after stamens and pistils began to differentiate;

研究结果表明：1）幼穗分化进入雌雄蕊期，抗霜力急剧下降，以后下降缓慢，表明雌雄蕊—药隔期为低温敏感期；

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His host and his host's household, his men and his maids, as they became intimately known to Clare, began to differentiate themselves as in a chemical process.

老板和老板娘、男工和女工都变成了克莱尔熟悉的朋友，他们像发生化学变化一样开始显示出各自不同的特点。

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Children began to differentiate the racial groups at around age 4, but many of the children still did not recognize the racial categories.

WSJ: In Children, Bias Blooms Chillingly Early | Mind & Matter

It was only after Mikhail Gorbachev, the Soviet Union's new leader, summoned Mr Yeltsin to Moscow in 1985 that he began to differentiate himself from dozens of other senior party apparatchiks.

ECONOMIST: Russia’s flawed reformer | The